2. Graph the function f(x) =2cos | 2x -~ +1 below and identify the amplitude, the period, the phase shift, and the vertical displacement. (7 marks) 2TT -T1/2Numerical Response 6. The circle shown below, with centre O, has a radius of 30 m - ZOMN = LONM . The length of arc MN, to the nearest tenth of a metre, is M SHORT ANSWER: Show all of your work. 1. The tip of the blade of one windmill reaches its minimum height of 8 m above the ground at a time of 2 s. Its maximum height is 22 m above the ground. The tip of the blade rotates 12 times per minute. Write a sine and a cosine function to model the rotation of the tip of the blade. Provide support for your answer. A graph is not necessary. (8 marks - 1 mark for the value of the parameter and 1 mark for the support of the value; 2 marks for the equations) Math 30-1 Unit 2 Exam (Winter 2015) Center for Learning at Home Page 7 of 11